Improvement in grain-separators



1L F. DUNHAM. Grain Separator.

Patented July 10,1866.

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driven or UNITED STATES PATENT OFFICE- IMPROVEMENT IN GRAlN-SEPARATORS.

Specification forming part of Letters Patent No. 56,194, dated July 10, 1866.

To all whom it may concern:

Be it known that I, J. F. D ette, in the county of Fayet Iowa, have invented a new Grain-Separator and I do here the followin UNHAM, of Fayte and State of and Improved by declare that g is afull, clear, and exact descripwhich will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a plan or top view of my invention; Fig 2, a side sectional view of the same, taken in the line 00 on, Fig. 1.

Similarletters of reference indi This invention relates to a grain-separatingdevice to b ing-machines ually weeds,

cate like parts. newand improved e applied to thrashand designed to separate effectstraw, 850., from the grain after passing through the thrashing mechanism.

The invention is applied to the shoe of a thrashing-machine, and is described as follows:

A represents the shoe of a thrashing-machine suspended in theframingof the machine in the usual manner, so as to be capable of having the ordinary shake motion imparted to it.

B represents a screen placed within the shoe A, and 0 represents a series of parallel wires inserted horizontally, or nearly so, in the lower part of the inner side of the shoe, to guide the grain and straw, after passing through the thrashing mechanism, upon the screen B.

The main portion a of the bottom of the shoe A is inclined down ward from the front or outer end toward the inner end, as shown in Fig.2, and the front part, b, of said bottom is inclined downward a certain distance from its inner toward its outer end, and is then inclined upward, as shown at 0. The part b has an inclined spout, D, connected with it, which spout extends the whole width of the shoe and discharges the grain from one side, thereof into suitable elevators.

The outer end of the screen B is in a vertical line or plane with the front end of the part b of the bottom of the shoe, and in front of the screen B there is a metal plate, E, which is perforated w in diameter them.

F is an inclined board placed in the shoe directly in front of the plate E, said board extending down obliquely toward the bottom part, b, of the shoe, as shown in Fig.2.

G is a plate placed in front of the inclined board F and perforated with holes like the plate E. This plate G is inclined downward from its inner toward its outer end, the upper edge of the board F being a trifle above the upper surfaces of the plates E G.

H is a horizontal shaft, the bearings of which are attached to the framing of the machine. This shaft His directly over the plate E, and has fitted upon it an oblong rectangular frame, I, having teeth 0 at both ends. This frame'is composed of two arms, ff, fitted transversely and centrally on the shaft H, and connected at their ends by bars gg, which are parallel with each other and the shaft H, the teeth 0 being fitted in the bars g g, and having an oblique or inclined. position, as shown in Fig. 2.

The frame I, when t ith round holes d, sufficiently large to allow the grain to pass through he device is in opera tion, is rotated in the direction indicated by arrow 1 by means of a belt passing around a pulley, It, at one end of shaft H.

The thrashed grain passes on the inner end of screen B, and the fine grass-seeds and other seeds pass through the screen, the grain being too large to pass through.

The revolving toothed frame I serves as a discharger to carry the grain, weeds, 00., 0d from the outer end of the screen, while the grain passes through the perforations in plate E and falls into spout D, which conveys it into the elevators. Any portion of grain which might chance to be carried over the plate E with the grain, weeds, 85c passes through the perforations in plate G and falls into spout D.

Bythis simple means a perfect separation of the grain from the straw is obtained, and the straw, weeds, 850., are discharged from the shoe with certainty, the shoe being effectually prevented from choking or clogging-a contingency hitherto of frequent occurrence, es pecially if the straw be slightly damp.

It will be seen that the perforated plate G, in consequence of being inclined, admits of the straw passing readily off from it.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The perforated plates E G, fitted in a shoe, A, of a thrashing-machine at the outer end of its screen 13, in connection with the spout D and inclined parts I) c of the bottom of the shoe, substantially as and tor the purpose set forth.

2. The rotary frame or discharger I, in combination with the perforated plates E G, ar ranged and applied to the shoe A and in relation with the screen B, substantially as and for the purpose specified.

The above specification of my invention signed by me.

J. F. DUNHAM.

Witnesses HENRY BURK, D. A. HOMER. 

